Wood-filler.



CFFIC.

JAMES S. MOTTER, OF MILWAUKEE, WISCONSIN, ASSIGNOR TO S. C. JOHNSON 8cSON, OF RACINE, WISCONSIN, A CORPORATION OF WISCONSIN.

WOOD-FILLER.

No Drawing.

To all whom it may concern Be it known that I, JAMES S. MOTTER, acitizen of the United States, and resident of Milwaukee, in the countyof Milwaukee and State of Visconsin, have invented new and usefulImprovements in Wood-Fillers, of which the following is a description.

I have discovered a new ingredient for use as a wood filler, whichrequires less oil than materials heretofore used for this pur pose, andconsequently requires less time for drying and leaves more solid matterso as to assure against shrinkage, and which remains in solutionindefinitely without separating. This wood filler ingredient consists ofa mineral which is mined in the northern peninsula of Michigan, in thecounty of Dickinson, near the city of Metropolitan. It is white incolor, with a specific gravity of 2.66, weighing 22.15 pounds pergallon, and is crystalline in structure, though very soft and easilycrushed or ground. Its settling point in 87% gasolene is 32 seconds,while its oil absorption to form a putty paste is one gallon of oil to50.5 pounds of mineral. This mineral is now being marketed as, Johnsonswhite mineral or metronite, and the following constitutes a chemicalanalysis thereof:

Aoicl soluble portion.

Iron and alumina, Fe O and A1 0 0.34% Calcium carbonate, CaCO 46.30%Magnesium carbonate, MgCO 35.19% Insoluble portion, (silicates,) 18.17%

Analysis of insoluble portion.

. Silica, SiO 10.56% Calcium oXid, CaO 3.68% Magnesium oXid, MgO 3.48%Iron and alumina, Fe O and A1 0,. .45%

*Existing as a double silicate nesium. As in tremolite asbestos.

The oil absorption of this mineral, under which 1t only requlres threegallons of raw linseed oil to 100 pounds of the mineral as of calciumand magflcpiea of this patent may be obtained for five cents each, byaddressing the Specification of Letters Patent.

Patented June 27, 1916.

compared with 5-2 gallons of oil for the same quantity of hard or softsilica to reach the proper consistency for a wood filler, assures acomparatively quick drying action for the new mineral ingredient with acorrespondingly better filling effect, since the filler with less oilcontains a greater quantity of solid matter. This low percentage of oilfurthermore assures against shrinkage of the filler. Unlike variousother mineral ingredients of wood fillers the present mineral has theproperty of remaining in solution indefinitely without separation, andthough it is of a crystalline structure it is soft and easily crushedand ground. The wood filler with this mineral is produced by theaddition of oil and driers as usual.

What I claim as new and desire to secure by Letters Patent is:

1. A wood filler containing a vehicle and a mineral ingredient havingsubstantially the composition of calcium carbonate 46% and magnesiumcarbonate 35%.

2. A wood filler containing a vehicle and a mineral ingredientconsisting of a white, crystalline mineral having a specific gravity ofapproximately 2.66 and a weight of approximately 22.15 pounds per gallonand an oil absorption for putty paste of approximately one gallon of oilto 50.5 pounds of mineral and containing calcium carbonate substantially46% and magnesium carbonate substantially 35%.

3. A wood filler containing a vehicle and a mineral ingredient analyzingthe following compounds in substantially the proportions given:

In testimony whereof, I affix my signature, in presence of twowltnesses.

JAMES S. MOTTER. Witnesses:

H. W. HOUGHTON, REINH. R. BRENTZMANN.

"Commissioner of Patents.

Washington, D. 0."

